长寿命沥青路面剪应力分析  

Analysis of Shearing Stress in Long-life Asphalt Pavements

作　　者：孙红燕[1] 郑传超[1] 高世君 高景伟 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]陕蒙高速公路建设管理处 [3]陕西榆林市交通局,陕西榆林719000

出　　处：《公路交通科技》2010年第9期8-13,共6页Journal of Highway and Transportation Research and Development

基　　金：陕西省交通建设科技项目(0505k)

摘　　要：基于陕蒙高速长寿命路面结构组合形式，借助弹性层状体系理论分析了带级配碎石基层的沥青路面各结构层参数变化时，沥青层内最大剪应力及最大剪应力作用方向的变化规律。结果表明：沥青层内最大剪应力峰值的位置与沥青层厚度关系最为密切。当沥青层较薄，其厚度≤11cm时，最大剪应力出现在沥青层底。当沥青层厚度≥12cm时，最大剪应力出现在6—7cm处。沥青层内最大剪应力及其作用方向受沥青层厚度和水平荷载的影响最显著。水平力的作用对7cm以上路面结构内的最大剪应力影响巨大，水平荷载越大，相应的最大剪应力峰值也越大。分析结果为长寿命路面结构设计提供了理论基础。Based on the pavement structure of Shaanxi and Inner Mongolia Expressway, variation regularities of maximum shearing stress and its direction were analyzed by elastic multi-layered system theory when structure parameters of asphalt pavement with graded macadam base vary. The result shows that （ 1 ） The position of maximum shearing stress peak value depends on asphalt layer thickness. When asphalt layer thickness is less than 11 cm, maximum shearing stress appears at the bottom of asphalt layer. When asphalt layer thickness is not less than 11 cm, maximum shearing stress appears at the depth of 6 - 7 cm. （2） Asphalt layer thickness and horizontal load have the most effect on maximum shearing stress and its direction. Horizontal load has most influence on the zone from pavement surface to the depth of 7 cm. The larger the horizontal load is, the higher the maximum shearing stress peak value is. The results could provide a theoretic reference for design of the long-life asphalt pavement.

关 键 词：道路工程 长寿命沥青路面 最大剪应力 弹性层状体系理论 最大剪应力方向 

分 类 号：U416.217[交通运输工程—道路与铁道工程]